JPWO2016203587A1 - Simulation signal generation apparatus, simulation signal generation method, and computer program - Google Patents

Abstract

[Problem] An object is to generate a simulation signal suitable for an operating environment. [Solution] A simulation signal generating apparatus as one aspect of the present invention includes a charge / discharge condition acquisition unit that acquires charge / discharge conditions of a storage battery system, and a signal feature quantity acquisition that acquires a plurality of charge / discharge signal feature quantities of the storage battery system. And a feature signal generation processing unit for generating a plurality of feature signals each having a plurality of charge / discharge signal feature amounts based on the plurality of charge / discharge signal feature amounts, and combining the plurality of feature signals into a storage battery system A simulation signal generation unit that generates a simulation signal that is a charge / discharge command signal to be applied.

Description

  Embodiments described herein relate generally to a simulation signal generation device, a simulation signal generation method, and a computer program.

  A stationary large storage battery system (ESS: Energy Storage System) can be used to improve power quality, such as stabilization of power in a power system or a local system such as a factory or a building, and suppression of frequency fluctuations. In addition, it has a charge / discharge function that discharges electric power or charges surplus electric power during peak use by consumers. Such a power storage system is expected to expand in the future market.

  The storage battery system is subjected to a performance test to check whether a predetermined performance is satisfied before the operation is started. In the performance test, charge / discharge command values assuming an actual operating environment are given. Generally, the charge / discharge command value given during the test uses existing data, constant current, or a simulation signal that combines sine wave, rectangular wave, triangular wave, etc., but reflects the actual operating environment as much as possible. A value is desirable. Since the characteristics, life, safety, etc. of the battery greatly depend on the operating environment, if the actual operating environment is not sufficiently reflected, the effects of customization and safety measures based on the test results will be poor. Moreover, by obtaining an accurate test result, it is possible to predict the replacement time of the battery with high accuracy and to estimate the response plan in advance.

  The charge / discharge command value that is actually in operation is a superposition of charge / discharge commands for various uses of the storage battery system. Therefore, the actual charge / discharge command value depends on various environmental factors of the connection destination system of the storage battery system and becomes very complicated. Therefore, it has been difficult to generate a charge / discharge command value that is very similar to the operation environment in the operation test.

Japanese Patent No. 36837553 Japanese Patent No. 4697105 Japanese Patent No. 5498414

International Electrotechincal Commission Market Strategy Board, Electrical Energy Storage White Paper, December 2011, p.10-p.14, Internet <URL: http://www.iec.ch/whitepaper/pdf/iecWP-energystorage-LR-en. pdf>

  An embodiment of the present invention aims to generate a simulation signal suitable for an operating environment.

  A simulation signal generation device as one aspect of the present invention includes a charge / discharge condition acquisition unit that acquires charge / discharge conditions of a storage battery system, a signal feature amount acquisition unit that acquires a plurality of charge / discharge signal feature amounts of the storage battery system, and a plurality of Based on the charge / discharge signal feature amount, a feature signal generation processing unit that generates a plurality of feature signals having each of the plurality of charge / discharge signal feature amounts, and a charge / discharge of the charge / discharge that is provided to the storage battery system by combining the feature signals A simulation signal generation unit that generates a simulation signal that is a command signal.

The block diagram which shows an example of schematic structure of the simulation signal generation apparatus which concerns on 1st Embodiment. The figure which shows an example of a daily load curve. The figure which shows the use of a storage battery system, and the distribution of the issuing frequency and charge / discharge duration for every said use. The flowchart of the simulation signal generation by FFT and inverse FFT. The flowchart of the simulation signal production | generation using a basic signal. The flowchart of a superimposition simulation signal production | generation. The block diagram which shows an example of schematic structure of the simulation signal generation apparatus which concerns on 2nd Embodiment. The flowchart of a feedback process.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(First embodiment)
FIG. 1 is a block diagram illustrating an example of a schematic configuration of a simulation signal generation device according to the first embodiment. The simulated signal generation apparatus 100 includes a signal data acquisition unit 101, a signal feature amount extraction unit 102, a signal feature amount acquisition unit 103, and N (N is an integer of 1 or more) feature signal generation units 104. A signal generation processing unit 111, a charge / discharge condition acquisition unit 105, a simulation basic signal generation unit 106, a simulation signal synthesis unit 107, a simulation signal adjustment unit 108, and a simulation signal output unit 109 are provided.

  The simulated signal generation device 100 is connected to a storage battery system 201, a signal data storage unit 301, a signal feature amount storage unit 302, and a rating information storage unit 303.

  The simulation signal generation device 100 generates a simulation signal to be given to the storage battery system 201. The simulated signal is a signal represented by the relationship between electric power and time, and is used as a command signal (charge / discharge command value) for causing the storage battery system 201 to perform charge / discharge. Here, it is assumed that the generated simulation signal is used as the charge / discharge command value in the operation test of the entire storage battery system before the storage battery system 201 is installed for actual operation.

  The generated simulation signal has the same characteristics as the charge / discharge command value in the assumed operation environment of the storage battery system 201 and is generated with an arbitrary data length. The generation method will be described later.

  The storage battery system 201 charges and discharges the connected power system based on the simulation signal generated by the simulation signal generation device 100. By charging and discharging, the interaction between the inverter and the battery pack in the storage battery system 201, the noise current generated by the operation of the inverter, and the like can be examined. Data on charge / discharge performed (charge / discharge measurement data) is sent to the signal data storage unit 301. The charge / discharge measurement data includes information such as voltage, current, and storage battery temperature. The charge / discharge measurement data can also be fed back to the simulation signal generator 100 and used to improve the accuracy of the simulation signal.

Ｔはサンプリング周期であり、ｓ（ｎＴ）は、時刻ｎＴにおける電力値を表す。The signal data storage unit 301 stores signal data such as simulation signals generated in the past and charge / discharge measurement data of other storage battery systems in operation. The signal data is data relating to a time-series signal. The signal data S (t) at time t (t is a number equal to or greater than 0) is a set of n data (n is an integer equal to or greater than 1), and is represented by the following equation.

T is a sampling period, and s (nT) represents a power value at time nT.

  The signal feature quantity storage unit 302 stores a charge / discharge signal feature quantity or a control signal feature quantity (hereinafter referred to as “signal feature quantity”) for the storage battery system, which is used to generate a simulation signal. As the signal feature amount, statistical information related to the simulation signal to be generated or usage information related to the storage battery system 201 that provides the simulation signal is used.

  The statistical information includes information on a probability density function (PDF) and frequency spectral density (PSD). For example, the average value, variance value, skewness, kurtosis, flatness, etc. in the probability density function, and the amplitude and phase of each frequency in the frequency spectrum are used as feature quantities.

  The usage information related to the storage battery system 201 includes, for example, the usage of the storage battery system 201 and the ratio of the usage. Applications include frequency adjustment, voltage adjustment, peak shift, and reserve capacity. The ratio of the use includes the execution time or the number of executions of each use or the ratio of both of them. When each use is unavailable, the ratio may be zero. Further, not the entire storage battery system, but information such as unit batteries (cells) and battery modules constituting the storage battery, connection configurations thereof, and the like may be used.

  The reason why the usage information of the storage battery system 201 is used as the signal feature amount is that it is considered that the periodicity of the simulation signal, which is a time series signal, can be associated with the use and scale of the storage battery system 201. In general, a time series signal is analyzed by being decomposed into long-term fluctuations, periodic fluctuations, and irregular fluctuations. It is known that the fluctuation component of the periodic fluctuation is composed of periodic fluctuation components in different periods such as a daily fluctuation, a monthly fluctuation, and a seasonal fluctuation among the load fluctuation components viewed from the electric power system.

  FIG. 2 shows an example of a daily load curve representing changes in power consumption during the day. As described above, the value differs depending on the country, region, and scale of the system, and the value and frequency of the charge / discharge command differ depending on the role of the storage battery system connected to the system, the scale of the system, and the requirements.

  FIG. 3 shows the usage of the storage battery system, and the distribution of the frequency of issuing and the duration of charge and discharge for each usage. In FIG. 3, the role of the storage battery system is classified into four types: reserve capacity securing, time shift, voltage maintenance adjustment, and frequency maintenance adjustment. Since the use frequency and the use time differ depending on the type of application, the charge / discharge command value also varies depending on the ratio of the application to be performed.

  The rating information storage unit 303 stores rating information regarding the storage battery system 201. The rating information is information such as specifications of the storage battery system 201. For example, there are charging / discharging upper and lower limit values determined only by the performance of the power storage system alone, power storage capacity, power consumption, charging time, number of times of charging, operating temperature, and the like, and the type of battery. Information such as a unit battery (cell) or a battery module constituting a storage battery in the storage battery system 201 may also be used. Further, these connection configurations may be used.

  Next, the internal configuration of the simulation signal generation apparatus 100 will be described.

  The signal data acquisition unit 101 acquires one or more signal data from the signal data (time series data) stored in the signal data storage unit 301. The acquired signal data is sent to the signal feature quantity extraction unit 102 and is used to generate a signal feature quantity. It is assumed that the acquired signal data satisfies an operation condition that is a condition imposed on the storage battery system 201 during actual operation. The operating conditions are determined in consideration of, for example, the place where the storage battery system 201 is scheduled to operate, the surrounding environment, the planned charge / discharge frequency, the type and ratio of the usage of the storage battery system 201, the scale of equipment, and the like. Further, information on unit batteries (cells) and battery modules constituting the storage battery may be used instead of the entire storage battery system 201. Further, these connection configurations may be used.

信号特徴量抽出部１０２は、必要に応じ、信号の確率分布の偏り、正規分布からの逸脱の度合いなど、より高次のモーメントを算出して信号特徴量としてもよい。この信号特徴量により、生成する模擬信号の調整を行うことができる。The signal feature amount extraction unit 102 acquires signal data from the signal data acquisition unit 101, performs one or more signal processing such as statistical processing on the signal data, and generates one or more signal feature amounts. There are _N types of signal processing executed by the signal feature quantity extraction unit 102 from f ₁ (S) to f _N (s). When all signal processing is performed, N sets of signal feature values are obtained from one set of time-series signals S (t). Signal processing includes, for example, average or variance or both. The average μ and the variance V are obtained by the following formula using p which is an integer of 1 or more.

The signal feature quantity extraction unit 102 may calculate higher-order moments such as bias of the probability distribution of the signal and the degree of deviation from the normal distribution as necessary to obtain the signal feature quantity. The simulation signal to be generated can be adjusted by the signal feature amount.

  The signal feature amount acquisition unit 103 acquires one or more signal feature amounts from the signal feature amount extraction unit 102. Alternatively, the signal feature amount of the signal data satisfying the operation condition may be acquired from the signal feature amount storage unit 302. The signal feature amount is individually sent to the feature signal generation unit 104 in accordance with each content.

  Note that the function of acquiring the signal feature amount from the signal feature amount storage unit 302 and the function of individually sending it to the feature signal generation unit 104 may be separated.

  Each feature signal generation unit 104 generates a feature signal based on a single signal feature amount sent from the signal feature amount acquisition unit 103. The generated feature signal has the signal feature amount. The generated feature signal has a predetermined data length. The feature signal generation unit 104 may perform processing such as interpolation and extrapolation in order to obtain a predetermined data length. The feature signal is sent to the simulation signal synthesis unit 107.

  The charge / discharge condition acquisition unit 105 acquires the rating information of the storage battery system 201 from the rating information storage unit 303. The charging / discharging condition acquisition unit 105 generates charging / discharging conditions that represent charging / discharging restrictions determined by the acquired rating information. The charging / discharging conditions of the storage battery system are not only defined by the performance of the inverter, but also the capacity of the system to which the storage battery system is installed and connected, and the power generation system and power consumption that are separate from the storage battery system It is also defined by the equipment. That is, charging / discharging to the storage battery system is also defined by the pattern in which these devices and other systems are operated and external conditions such as mismatch between power generation and load. The charge / discharge conditions here include such externally defined conditions. It is possible to obtain a pattern in which charging / discharging is performed in the form of a command value to the storage battery system through a simulation considering these charging / discharging conditions. And charging / discharging conditions become a constraint condition which produces | generates a simulation signal. At this time, if the rating information to be acquired includes information unnecessary for generating the simulation signal, the charging / discharging conditions may be generated after removing the information. Data representing the charge / discharge conditions is sent to the simulation basic signal generation unit 106 and the simulation signal adjustment unit 108.

  The simulation basic signal generation unit 106 generates a basic signal for generating a simulation signal. The basic signal is a signal that is the basis of the simulation signal. The simulated basic signal generation unit 106 generates a basic signal so as to satisfy the acquired charge / discharge conditions. The basic signal generated based on this charge / discharge condition can be regarded as one of the plurality of characteristic signals described above. The basic signal may be a signal distributed in a uniform distribution or a Gaussian distribution. Further, for example, there is a method of generating a uniformly distributed random number of signals that satisfy charging / discharging conditions and then synthesizing a normal distributed random number generated by the Box-Muller method. The generated basic signal is sent to the simulation signal synthesis unit 107.

  The simulation signal synthesis unit 107 generates a simulation signal based on one or more feature signals from the one or more feature signal generation units 104 and the basic signal. The basic signal may be signal data stored in the signal data storage unit 301 instead of the basic signal generated by the simulated basic signal generation unit 106. As a generation method, there is a method in which a feature signal is superimposed on a basic signal and synthesized. An embodiment in which a simulated signal is generated by combining a plurality of feature signals without using a basic signal is also possible. The synthesized simulation signal is sent to the simulation signal adjustment unit 108.

  The simulation signal adjustment unit 108 confirms whether the charge / discharge conditions generated by the charge / discharge condition acquisition unit 105 are satisfied for the synthesized simulation signal. Further, the simulation signal is adjusted as necessary. For example, adjustment such as multiplying a value of the simulation signal by a predetermined coefficient is performed. The adjusted simulation signal is sent to the simulation signal output unit 109. The format of the simulated signal represents the relationship between time and power value, which can be interpreted as a charge / discharge command value according to time by the storage battery system, but can be interpreted by the storage battery system as necessary. May be converted to

  The simulation signal output unit 109 outputs the simulation signal from the simulation signal adjustment unit 108 to the storage battery system 201.

  The above is the schematic configuration of the simulation signal generation device according to the first embodiment.

  Next, an example of a method in which the simulation signal generation apparatus 100 actually generates a simulation signal will be described. FIG. 4 is a flowchart for generating a simulation signal by FFT (Discrete Fast Fourier Transform) and inverse FFT.

  The signal data acquisition unit 101 acquires at least one signal data (referred to as a reference signal) from the plurality of signal data stored in the signal data storage unit 301 (S101).

  The reference signal to be acquired may be designated by the user or may be selected by the signal data acquisition unit 101. As a selection method, it is only necessary to select data of a power storage system that matches the operating environment, purpose of use, rating, and the like of the power storage system to be tested.

  The signal feature amount extraction unit 102 extracts the feature amount (signal feature amount) of the signal from the reference signal acquired by the signal data acquisition unit 101 (S102).

  It is assumed that the feature amount to be extracted is determined in advance. Here, it is assumed that the signal feature amount extraction unit 102 calculates a signal feature amount related to the frequency spectrum and the phase spectrum after calculating the frequency spectrum and the phase spectrum by using FFT or an autoregressive model.

  The signal feature amount acquisition unit 103 distributes each of the plurality of signal feature amounts acquired from the signal feature amount extraction unit 102 to each feature signal generation unit 104 (S103).

  The distribution destination is assumed to be determined in advance by the input signal feature amount.

  When adding a specific signal feature quantity to the simulation signal, such as when it is desired to have a signal feature quantity different from the reference signal in the generated simulation signal, the signal feature quantity acquisition unit 103 includes the signal feature quantity storage unit 302. The signal feature amount may be acquired from

  Each feature signal generation unit 104 calculates a feature signal based on the acquired signal feature amount (S104). When there are N signal feature amounts, N feature signals are generated.

  In this flow, each feature signal generation unit 104 performs a discrete inverse Fourier transform on the given frequency spectrum or phase spectrum after performing an interpolation process so as to have a predetermined data length. As a result, N feature signals (N time-series data) are generated.

  The simulated signal synthesis unit 107 synthesizes a plurality of feature signals generated by the feature signal generation units 104 (S107).

  In this flow, only the characteristic signal is synthesized without using the basic signal generated by the simulated basic signal generation unit 106. By this synthesis, the simulation signal has the characteristics of the reference signal.

  The simulation signal adjustment unit 108 adjusts the generated simulation signal (S108), and the simulation signal output unit 109 outputs the simulation signal (S109). The output simulation signal is sent to the power storage system. This is the end of the simulation signal generation flow.

  Next, a flow for generating a simulation signal using the basic signal generated by the simulation basic signal generation unit 106 will be described. FIG. 5 is a flowchart of generating a simulation signal using a basic signal. This flow is to generate a new simulation signal having the same characteristics as the basic signal. The specific processing is different from the above flow in that processing for generating a basic signal is added.

  The processing of the signal data acquisition unit 101 is the same as the above-described flow (S101).

  The signal feature amount extraction unit 102 calculates the frequency feature density (PSD) and probability density function (PDF) of the reference signal, and then calculates the signal feature amount related to PSD and PDF.

  The processing of the signal feature amount acquisition unit 103 is the same as the above-described flow (S103).

  Each feature signal generation unit 104 calculates a feature signal based on the signal feature amount related to the probability density function (PDF) (S104). Specifically, after generating a uniformly distributed graph, a random number is generated to generate a time series graph that matches a signal feature amount related to PDF.

  Also, one of the feature signal generation unit 104 generates a frequency filter that simulates the frequency spectrum shape of the reference signal based on the frequency spectral density (PSD). This is because the time series graph generated based on the random number in step S104 is random on the frequency spectrum, and thus needs to be filtered by an FIR filter or an IIR filter.

  The charge / discharge condition acquisition unit 105 acquires rating information from the rating information storage unit 303 (S201).

  For example, the charge / discharge condition acquisition unit 105 may be preliminarily given a number of a storage system to be tested, and the rating information to be acquired may be determined by the number or the like.

  The simulated basic signal generation unit 106 generates a basic signal based on the acquired feature amount and the rating information acquired from the rating information storage unit 303 (S202).

  The type of basic signal to be generated may be determined in advance or may be determined based on the feature amount of the reference signal.

  The simulated signal combining unit 107 combines the plurality of feature signals generated by the feature signal generating units 104 and the basic signal from the simulated basic signal generating unit 106 (S107).

  The subsequent processing is the same as the flowchart (see FIG. 4) of the simulation signal generation by FFT and inverse FFT. This is the end of the simulation signal generation flow using the basic signal.

  Next, a method for generating a simulation signal on which a simulation signal for each application is superimposed will be described. FIG. 6 is a flowchart of superimposition simulation signal generation.

  When there are a plurality of uses of the power storage system, the simulation signal is generated by superimposing a plurality of simulation signals generated for each use. Hereinafter, the simulation signal generated for each application is referred to as a simulation signal for each application, and the simulation signal generated by superimposing the simulation signals for a plurality of applications is referred to as a superimposed simulation signal.

  A case is assumed where the storage battery system is used for three types of applications: FR (frequency fluctuation suppression), voltage control, and peak shift. The signal data acquisition unit 101 acquires reference signals for each of the three types of applications (S301A, S301B, S301C).

  The processes of the signal data acquisition unit 101, the signal feature quantity extraction unit 102, and the signal feature quantity acquisition unit 103 are the same as the simulation signal generation process, and are therefore omitted.

  Each feature signal generation unit 104 performs interpolation processing (S302A, S302B, S302C) and adjusts the data length before performing inverse Fourier transform.

  Since the response speed (time constant) of the power storage system with respect to the charge / discharge command is different for each use of the power storage system, it is expected that the time interval of the time series data of the simulated signal for each use is also different. Therefore, if the simulation signal for each application is superimposed as it is, the time interval of the time-series data of the superimposed simulation signal becomes uneven. Further, if interpolation is performed on such a superimposed simulation signal, the signal feature amount is lost. Therefore, in order to generate a superimposed simulation signal that appropriately reflects signal feature amounts, interpolation processing is performed on the simulation signal for each application before superimposition, and the time interval of time series data of each simulation signal is set in advance. Must be aligned.

  Each feature signal generation unit 104 performs interpolation processing on each of the three types of simulation signals for FR, voltage control, and peak shift, and makes the number of time series data the same for all three types. In the interpolation, data having a value of 0 is interpolated at the time when the time series data of the simulated signal for each of other uses exists. However, if there is own time-series data at the same time, no interpolation is performed. In this way, after adding the required number of data, the FIR filter is applied to retain the signal feature amount.

  For the interpolation, methods such as primary interpolation (linear interpolation), secondary interpolation (parabolic interpolation), and zero-order interpolation (nearest neighbor interpolation) may be used.

  The subsequent processing of the feature signal generation unit 104, the simulation signal synthesis unit 107, the simulation signal adjustment unit 108, and the simulation signal output unit 109 is the same as the process of simulation signal generation, and is therefore omitted. This is the end of the superimposed simulation signal generation flow. In this way, a superimposed simulation signal can be generated by superimposing a simulation signal for each application.

  As described above, according to the first embodiment, a simulation signal similar to a charge / discharge command value complicated by various uses such as frequency control, voltage control, and peak shift is generated as in actual operation. And the situation at the time of an operation | movement is realizable by applying to a storage battery system. Therefore, a highly reliable test result can be obtained in the test before operation.

In addition, by comparing the charge / discharge data acquired in the test with the charge / discharge data in the future operation, the state of the storage battery system and the progress of deterioration can be monitored without stopping or disconnecting the storage battery system. It is possible to estimate.
(Second Embodiment)

  FIG. 7 is a block diagram illustrating a schematic configuration of a simulation signal generation apparatus according to the second embodiment. In the second embodiment, a storage battery response acquisition unit 110, a response characteristic evaluation unit 111, and a simulated signal correction unit 112 are added to the first embodiment. The response characteristic evaluation unit 111 is included in the feature signal generation unit 113, but may be disposed outside the feature signal generation unit 113.

  The storage battery response acquisition unit 110 acquires a response from the storage battery system 201. The response is charge / discharge measurement data measured when the storage battery system 201 performs charge / discharge according to the simulation signal. That is, the result for the simulation signal is fed back from the storage battery system 201. The storage battery response acquisition unit 110 selects or calculates data (response data) for evaluating the simulation signal from the fed back charge / discharge measurement data. It is assumed that a method for selecting or calculating the response data is predetermined.

  For example, it is assumed that the storage battery response acquisition unit 110 acquires the current value, voltage value, and temperature data when charging and discharging the storage battery as the response of the storage battery. The storage battery response acquisition unit 110 reads the response data or the calculation formula of the response data corresponding to the acquired current value, voltage value, and temperature data by using a pre-stored table format file, etc. calculate. The correspondence data may be stored in a signal data storage unit or the like, and may be acquired by the storage battery response acquisition unit 110 as necessary.

  In FIG. 7, the storage battery response acquisition unit 110 is stored inside the simulation signal generation device 100, but may be external.

  The response characteristic evaluation unit 111 evaluates the characteristics of the response data and determines whether correction is necessary. The determination is made based on measured values such as voltage, current, and temperature included in the response data. The simulated signal is determined based on the conditions of the power system and distribution system where the storage battery system is planned to be installed, such as frequency fluctuation suppression, but does not take into account various operating conditions such as the rated capacity, rated current, and operating temperature of the storage battery. Therefore, when the simulation signal is continuously applied, the storage battery system may deviate from the operation condition, and correction is necessary. For example, it is determined whether the response data characteristics and / or measurement values satisfy the conditions based on the threshold value or the effective range. If the conditions are not satisfied, the simulated signal output value needs to be corrected. Perform an evaluation. In addition, a correction method or a correction mode may be selected and included in the evaluation result.

  The simulated signal correcting unit 112 performs a correction process on the adjusted simulated signal from the simulated signal adjusting unit 108 based on the evaluation result from the response characteristic evaluating unit 111. The correction method may be determined in advance according to the content of the correction, or may be acquired from the response characteristic evaluation unit 111. The simulated signal correction unit 112 may calculate the amount to be corrected. The simulation signal to which the correction process has been applied is sent to the simulation signal output unit 109.

  For example, when there is a possibility that the accumulated value of charge / discharge of the power storage system until now deviates or deviates from a predetermined range, the fluctuation range is reduced by multiplying the simulation signal by a predetermined coefficient. Correction may be performed. Alternatively, the coefficient value may be calculated so that the simulation signal correction unit 112 does not deviate from the range. In addition, a correction that adds a positive or negative constant value as an offset to the charge / discharge value, a correction that adds a monotonically increasing or monotonically decreasing offset over time, and the like can be considered. Further, for example, when the internal temperature of the storage battery system rises due to charging / discharging and exceeds a predetermined limit temperature, the simulated signal correction unit 112 may temporarily stop the test.

  Other portions are the same as those in the first embodiment.

  FIG. 8 is a flowchart of feedback processing by each unit added in the second embodiment. This flowchart is started when the battery response acquisition unit receives a response from the power storage system.

  The storage battery response acquisition unit 110 selects or calculates response data from the charge / discharge measurement data fed back from the storage battery system 201 (S401).

  The response data is sent to the response characteristic evaluation unit 111.

  The response characteristic evaluation unit 111 evaluates the characteristic of the response data acquired from the storage battery response acquisition unit 110 and determines whether correction is necessary (S402, S403).

  It is assumed that the determination criteria are determined in advance. The evaluation result is sent to the simulated signal correction unit 112 together with the response data.

  The simulated signal correction unit 112 performs correction processing based on the evaluation result of the response characteristic evaluation unit 111 (S404). The simulation signal to which the correction process has been applied is sent to the simulation signal output unit 109.

  The subsequent processing is the same as the flowchart in the first embodiment. This completes the feedback processing flow.

  As described above, according to the second embodiment, it is possible to obtain a more reliable test result by feeding back the result of charging / discharging by the generated simulation signal.

  In addition, the simulation signal generation apparatus of each embodiment is realizable also by using a general purpose computer apparatus as basic hardware, for example. That is, it can be realized by causing a processor mounted on the computer apparatus to execute a program. At this time, the simulation signal generating device can be realized by installing the above program in the computer device in advance, storing it in various storage media, or distributing the above program via a network, and distributing this program to the computer device. It can be realized by installing it appropriately. In addition, each storage unit in the simulation signal generation device appropriately includes a memory, a hard disk or a storage medium such as a CD-R, a CD-RW, a DVD-RAM, and a DVD-R, which is built in or externally attached to the computer device. It can be realized by using.

  The present invention is not limited to the above-described embodiments as they are, and the constituent elements can be modified and embodied without departing from the spirit in the implementation stage. Various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the embodiment. For example, some constituent elements can be deleted from all the constituent elements shown in the embodiments, and elements over different embodiments can be appropriately combined.

  Although one embodiment of the present invention has been described above, these embodiment are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

DESCRIPTION OF SYMBOLS 100 Simulated signal production | generation apparatus 101 Signal data acquisition part 102 Signal feature-value extraction part 103 Signal feature-value acquisition part 104 Feature signal generation part 105 Charging / discharging condition acquisition part 106 Simulation basic signal generation part 107 Simulation signal synthesis part 108 Simulation signal adjustment part 109 Simulated signal output unit 110 Storage battery response acquisition unit 111 Response characteristic evaluation unit 112 Simulated signal correction unit 201 Storage battery system 301 Signal data storage unit 302 Signal feature amount storage unit 303 Rating information storage unit

Simulated signal generating apparatus according to one aspect of the present invention includes: a signal feature quantity acquisition unit that acquires a plurality of charge and discharge signal feature quantity to 蓄 cell system, based on the plurality of charge and discharge signal feature value, said plurality of charge A feature signal generation processing unit that generates a plurality of feature signals each having a discharge signal feature amount and a simulation that combines the plurality of feature signals to generate a simulation signal that is a charge / discharge command signal given to the storage battery system A signal generation unit.

Claims (9)

A charge / discharge condition acquisition unit for acquiring charge / discharge conditions of the storage battery system;
A signal feature amount acquisition unit for acquiring a plurality of charge / discharge signal feature amounts to the storage battery system;
A feature signal generation processing unit that generates a plurality of feature signals each having the plurality of charge / discharge signal feature amounts based on the plurality of charge / discharge signal feature amounts;
A simulation signal generation device comprising: a simulation signal generation unit that combines the plurality of feature signals to generate a simulation signal that is a charge / discharge command signal to be supplied to the storage battery system. Among a plurality of charge / discharge signals measured by at least one other storage battery system, a signal data acquisition unit that acquires a charge / discharge signal that satisfies an operation condition of the storage battery system;
The simulated signal generation device according to claim 1, further comprising: a signal feature amount extraction unit that extracts the charge / discharge signal feature amount from the charge / discharge signal acquired by the signal data acquisition unit. The simulated signal generation device according to claim 2, wherein the signal feature amount extraction unit extracts information relating to a frequency spectrum and a phase spectrum of the charge / discharge signal as the charge / discharge signal feature amount. The plurality of charge / discharge signal feature quantities include any plurality of information related to a probability density function, information related to a frequency spectral density, information related to an application of the storage battery system, and information related to at least one of average and variance. The simulation signal generation device according to any one of the above. A basic signal that is one of the plurality of characteristic signals is generated by generating the signal by random numbers using a uniform distribution or a Gaussian distribution of the signal based on the charge / discharge conditions of the storage battery system, and combining the generated signals. The simulation signal generation device according to claim 1, further comprising a simulation basic signal generation unit to generate. A storage battery response acquisition unit that acquires charge / discharge measurement data measured when the storage battery system performs charge / discharge according to the simulation signal;
A response characteristic evaluation unit for evaluating the characteristics of the charge / discharge measurement data;
The simulation signal generation device according to claim 1, further comprising: a simulation signal correction unit that corrects the simulation signal according to an evaluation result of the response characteristic evaluation unit. The response characteristic evaluation unit determines whether the charge / discharge measurement data matches an operation condition that is a condition imposed when the storage battery system is operated,
The simulation signal generation device according to claim 6, wherein the simulation signal correction unit corrects the simulation signal when the charge / discharge measurement data does not match the operation condition. A charge / discharge condition acquisition step for acquiring a charge / discharge condition of the storage battery system;
A signal feature amount obtaining step for obtaining a plurality of charge / discharge signal feature amounts to the storage battery system;
A feature signal generation processing step for generating a plurality of feature signals each having the plurality of charge / discharge signal feature amounts based on the plurality of charge / discharge signal feature amounts;
A simulation signal generation method comprising: a simulation signal generation step of combining the plurality of feature signals to generate a simulation signal that is a charge / discharge command signal given to the storage battery system. A charge / discharge condition acquisition step for acquiring a charge / discharge condition of the storage battery system;
A signal feature amount obtaining step for obtaining a plurality of charge / discharge signal feature amounts to the storage battery system;
A feature signal generation processing step for generating a plurality of feature signals each having the plurality of charge / discharge signal feature amounts based on the plurality of charge / discharge signal feature amounts;
A computer program for causing a computer to execute a simulation signal generating step of combining the plurality of characteristic signals to generate a simulation signal that is a charge / discharge command signal given to the storage battery system.

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